OLED-Based Multiple Analyte Sensing Platform

1 OLED-Based Multiple Analyte Sensing Platform [91] 

This section reviews some recent developments on a multiple analyte sensor that is based on identical Alpg-based OLED pixels and monitors the serum analytes glucose, lactate, ethanol, and oxygen, which are of clinical, health, industrial, and environmental importance. These analytes were monitored sequentially or simultaneously comparable results were obtained using both approaches. 

The sensing elements were based on PtOEP-doped PS films the films served as the base of wells that contained the solution of the analytes and GOx, lactate oxidase (LOx), or alcohol oxidase (AOx). The analyses were performed typically in sealed cells more complex responses were obtained when the analyses were performed in cells open to air. As shown below, the LOD for glucose, lactate, and ethanol was 0.02mM. The sensors were operated in the back-detection geometry and r mode. 

a plot of 1/t vs. the initial analyte concentration in the test solution will ideally be linear. Note that this equation is valid also for measurements performed with containers open to air, where the oxidation reaction is significantly faster than the in-diffusion of gas-phase oxygen. 

The OLED pixel array is similar to that shown in Fig. 3.12, i.e., the OLED pixels are defined by the overlap between the mutually perpendicular ITO and 

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